Trace-element composition of Fe-rich residual liquids formed by fractional crystallization: Implications for the Hadean magma ocean

Lee, Cin-Ty A.; Yin, Qing‐Zhu; Lenardic, Adrian; Agranier, Arnaud; O’Neill, Craig; Thiagarajan, Nivedita

doi:10.1016/j.gca.2007.04.023

Cited by 16 publications

(9 citation statements)

References 71 publications

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“…In the case of an EECR formed from late-stage melts after pyroxene and garnet crystallization, the Sm/Nd can be expected to be somewhat higher, thus having a smaller effect on Nd isotope systematics. Similar systematics have been observed by Lee et al (2007) for Fe-O-S late-stage liquids that these authors considered as an alternative representative for late-stage magma ocean melts.…”

Section: Implications For Short and Long Lived Isotope Systemssupporting

confidence: 86%

“…Whilst this contribution is focussing on Nb-Ta systematics, we also address the impact of the suggested residual liquid composition on other geochemical proxies, including long-lived isotopes and trace elements. We note that the possibility of Fe-rich late-stage liquids formed during magma ocean solidification as an analogue for a hidden Hadean reservoir has been suggested previously (Lee et al, 2007), but the nature of the studied rock series differs significantly in its trace element abundances and isotopic characteristics.…”

Section: Introductionmentioning

confidence: 61%

See 1 more Smart Citation

Deep mantle storage of the Earth’s missing niobium in late-stage residual melts from a magma ocean

Nebel

Westrenen

Vroon

et al. 2010

Geochimica et Cosmochimica Acta

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Section: Implications For Short and Long Lived Isotope Systemssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 61%

Deep mantle storage of the Earth’s missing niobium in late-stage residual melts from a magma ocean

Nebel

Westrenen

Vroon

et al. 2010

Geochimica et Cosmochimica Acta

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“…Other possibilities that have been raised include speculations about a Fe-rich residual liquids remaining after a Hadean magma ocean (Lee et al, 2007) and melt extraction from refractory harzburgites to obtain high Fe/Mn (Lee, 2004). The role of refractory harzburgites was shown to be ineffective in controlling the Fe/Mn in melts since the increase in the olivine modal fraction increases the bulk Fe/Mn but also increases the bulk D for FeO .…”

Section: Origin Of Global Variability In Fe/mn For Hotspotsmentioning

confidence: 99%

“…The role of refractory harzburgites was shown to be ineffective in controlling the Fe/Mn in melts since the increase in the olivine modal fraction increases the bulk Fe/Mn but also increases the bulk D for FeO . If a Hadean magma ocean left behind a Fe-rich layer in the deep mantle and this layer is still preserved, it could potentially explain the high Fe/Mn ratios observed in some OIB (Lee et al, 2007).…”

Section: Origin Of Global Variability In Fe/mn For Hotspotsmentioning

confidence: 99%

The Fe/Mn ratio in MORB and OIB determined by ICP-MS

Qin

Humayun

2008

Geochimica et Cosmochimica Acta

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“…They estimated the trace element composition of the basal magma ocean using partition coefficients between Mg-perovskite and melt, which were experimentally determined at the uppermost lower-mantle pressures (Corgne et al 2005). Lee et al (2007) investigated the trace element systematics in natural Fe-O-S magmas and proposed that a similar Fe-O-S melt, which can account for the difference between the 142 Nd/ 144 Nd ratios of chondrites and the ASE, had formed during the final stages of magma ocean solidification. However, these previous studies mainly focused on the trace element composition of the EER, and the pressure and temperature conditions required to form the EER and its major element composition remain unconstrained.…”

Section: Recent 142mentioning

confidence: 99%

Major element composition of an Early Enriched Reservoir: constraints from 142Nd/144Nd isotope systematics in the early Earth and high-pressure melting experiments of a primitive peridotite

Kondo

Yoshino

Matsukage

et al. 2016

Prog. in Earth and Planet. Sci.

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The Accessible Silicate Earth (ASE) has a higher 142 Nd reservoir is believed to have been derived from a melt in the early Earth and is called the Early Enriched Reservoir (EER). Although the major element composition of the EER is crucial for estimating its chemical and physical properties (e.g., density) and is also essential for understanding the origin and fate of the EER, which are both major factors that determine the present composition of the Earth, it has not yet been robustly established. In order to determine the major element composition of the EER, we estimated the age and pressuretemperature conditions to form the EER that would best explain its Nd isotopic characteristics, based on Sm-Nd partitioning and its dependence on pressure, temperature, and melting phase relations. Our estimate indicates that the EER formed within 33.5 Myr of Solar System formation and at near-solidus temperatures and shallow uppermantle pressures. We then performed high-pressure melting experiments on primitive peridotite to determine the major element composition of the EER at estimated temperature at 7 GPa and calculated the density of the EER. The result of our experiments indicates that the near-solidus melt is iron-rich komatiite. The estimated density of the near-solidus melt is lower than that of the primitive peridotite, suggesting that the EER melt would have ascended in the mantle to form an early crust. Given that high mantle potential temperatures are assumed to have existed in the Hadean, it follows that the EER melt was generated at high pressure and, therefore, its composition would have been picritic to komatiitic. As the formation age of the EER estimated in our study precedes the last giant, lunar-forming impact, the picritic to komatiitic crust (EER) would most likely have been ejected from the Earth by the last giant impact or preceding impacts. Thus, the EER has been lost, leaving the Earth more depleted than its original composition.

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Trace-element composition of Fe-rich residual liquids formed by fractional crystallization: Implications for the Hadean magma ocean

Cited by 16 publications

References 71 publications

Deep mantle storage of the Earth’s missing niobium in late-stage residual melts from a magma ocean

Deep mantle storage of the Earth’s missing niobium in late-stage residual melts from a magma ocean

The Fe/Mn ratio in MORB and OIB determined by ICP-MS

Major element composition of an Early Enriched Reservoir: constraints from 142Nd/144Nd isotope systematics in the early Earth and high-pressure melting experiments of a primitive peridotite

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